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16 Input Summing Mixer UAD Apollo x16 – LittleOne 16×4 DSUB-TRS – Master Insert – STM -Vari Gain – Monitor control

5.00 out of 5 based on 1 customer rating
(1 customer review )


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Summing Mixer UAD Apollo or similar sound card interface

16 in DSUB Tascam Analog Balanced
4 out (2 x Stereo) L/R TRS balanced as:
OUT 1-2 to Monitors (Attenuator controlled)
OUT 3-4 to Main Rec (DAW interface)
Master Insert SND/RET TRS balanced via switches
21 Step Precision Stereo Attenuator for MON (monitor outout)
*Atten. work range: -6.5dB to – 50 dB rel to 0dB
**Mon Out -10dB (+) -6dB = -16dB
**Mon Out -20dB (+) -6dB = -26dB
-10/-20dB variable headroom switch
1 x Stereo to 2 Mono (input)conversion switch

STM – Stereo to Mono Switch: It provides an extra stable Real Analog Mono Base for your mix (on monos like Kick/Bass/MainVox/Snare and so on), saving precious digital-to-analog (DA) channels (so you don’t waste stereo L/R for a mono instrument), and offers superior separation and 3D depth for the rest of your stereo instruments. This feature turns L/R inputs ‘COMBINED’ (two hard-panned L/R inputs) into an absolutely centered mono signal (1 x stereo to 2 mono). For example, ‘SNARE’ on channel 1 (left), ‘KICK’ on channel 2 (right). Mono instruments in the DAW sequencer (Steinberg cubase, pro tools, flstudio, reaper, logic pro, Ableton etc.) should place the kick hard left, the bass hard on the right, and so on. Stereo instruments: If you don’t use mono channels in your mix, simply turn down all the mono switches, and you’ll have a fully stereo analog summing mixer with panning options available from the DAW.

Master Insert Send Return Switches: Enables sending the master stereo L/R signal to external processors like EQ, compressor, or limiter, and then returning it to the master output for printing or recording. The ‘Master SND/RET’ is placed before the master out, with 100% of the signal routed to the send. The system requires two stereo switches for signal isolation and control: The first switch enables sending to external processors (routes the master to SND). The second switch enables the return from external processors (routes the return to the master out).

Variable Headroom Gain Switch: It provides a wide gain-volume range for different applications, offers gain stages between various microphone preamps or DAW interface inputs, and accommodates various source inputs, such as synthesizers or DAWs. Placed after passive SUM BUS (passive mixer) determines main out (total) gain reduction – for different (pre amps) applications – gain stage – volume range. You have a great opportunity to experiment with different gain reductions and determine what sounds better for your mix: 1. Whether it’s with fewer input signals and more amplification. 2.Or the other way around, with more signals and less amplification. Benefits: You can overdrive the summing inputs with different gains to achieve more saturation and warm harmonics.

You can get as many channels and options as you want, so let’s build your gear!

Build time: 14 Working Weekdays after cleared payment

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This summing mixer is designed for linking synthesizers, samplers, and rhythm machines, allowing you to route the combined output to a preamplifier for master processing. It’s tailored for use with Tascam US-16×08 and the third-generation Focusrite Scarlett 18i20.

Selected VISHAY DALE military metal-film resistors
In/Out: Dual Stereo Balanced Discrete Circuit
Output impedance 600-1k ohms balanced
DSUB DB25 Tascam Analog Standard balanced
Frequency response: 0-500Khz
Crosstalk 1Khz: -95dB
Signal to Noise rate (SNR): -110dB
TRS wiring: (Tip:HOT/,Ring:COLD/Sleeve:GROUND)
Pure hand made! Hand wired and tested point-to-point!
Laser engraved – massive aluminium alloy box.

Portable compact studio Analog Studio Summing Mixer with volume control attenuator potentiometer and stereo inserts, designed for recording studios, live sound, or mastering audio material.


UAD Apollo, Apogee, Arturia, Behringer, Focusrite, M-Audio, Motu, PreSonus, Prism, RME, Roland, SSL, Steinberg, Tascam, OTHER let me know


-6/-16dB, -10/-20dB default, -15/-25dB, -20/-30dB







1 review for 16 Input Summing Mixer UAD Apollo x16 – LittleOne 16×4 DSUB-TRS – Master Insert – STM -Vari Gain – Monitor control

5.00 out of 5 stars

  1. Reviewer profile image
    5 out of 5

    Carl Rusk

    Just want to share my first impression of Little One 16 passive summing box with stereo to mono options.

    I am just plain knocked. If your tracking chain is good but mixes sound muddy, boxy, thin and narrow compared to big production hits that’s the remedy. Like everyone else i’ve noticed that mix is much clearer and wider, instruments more separated and focused. I also have noticed that i’m using less outboard and plugins. Seriously. If you choosing between good compressors or eq’s (good means ADL, SSL etc) vs good summing box (you would need audio interface to support that too) without hesitation go for analog summing – you won’t be dissapointed if you want your mixes sound 3d. Also box is quiet as a mouse. I was little afraid to pick some noise on the way. But no ! – it’s just way superior to digital bouncing and that’s all!

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